JP2001294255A - Two-piece cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-piece cap not generating the defective capping when an inner stopper is capped on a neck section of a bottle even when the inner stopper in the tilted state is inserted into a cap main body. SOLUTION: The two-piece cap 10 is screwed and fitted on the bottle neck section 21 and formed of the cap main body 100 and the inner stopper 200 with an inner sealing ring 210, and the inner stopper is provided to be movable by a given interval in the up and down direction below the inner face of a top 110 of the cap main body, and when the movable interval of the inner stopper is defined as (b), the maximum tilting angle of the inner stopper is defined as α deg. and the outer diameter of the inner stopper is specified as (f), while the interval of the end stopper to the plane outer periphery of the lower face of the inner sealing ring is defined as (c) and the inner diameter of the plane of the lower face of the inner sealing ring is specified as (d) and also the plane inner diameter of the upper face of the bottle neck section is specified as (e), c×tanα deg.<(e-d)/2 and f×tanα deg.=b is satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-piece cap comprising a cap body and an inner plug which are screwed and attached to the mouth and neck of a bottle filled with a liquid content such as a beverage.

[0002]

2. Description of the Related Art Conventionally, for example, PET bottles filled with drinks such as fruit juice drinks, tea, black tea, and cola have used a two-piece cap in which an inner plug is inserted below the inner surface of a top plate of a cap body. In order to prevent liquid leakage due to loosening of the cap body during distribution / storage or resealing, an inner sealing ring that seals the bottle is vertically installed on the lower surface of Some were inserted movably in the direction by a predetermined interval.

[0003]

However, when the conventional two-piece cap described above is capped on the mouth and neck of a bottle filled with contents on a filling line, the inner plug is inclined and the inside of the cap body is inclined. When inserted, one end of the inner sealing ring of the inner plug abuts one side of the top surface of the mouth and neck of the bottle, and the inner sealing ring of the inner plug is inserted into the mouth and neck of the bottle. There was a case where a capping failure occurred due to failure to fit.

The present invention has been made to solve the above-mentioned conventional problems. Even when the inner plug is inserted in the cap body in an inclined state, it is possible to perform capping on the mouth and neck of a bottle on a filling line. In addition, the present invention provides a two-piece cap in which the inner sealing ring of the inner plug is completely fitted into the mouth and neck of the bottle and does not cause poor capping.

[0005]

That is, the present invention relates to a two-piece cap comprising a cap body and an inner plug having an inner sealing ring, which is screwed and mounted on the neck and neck of a bottle. A stopper is provided under the top surface of the top of the cap body,
It is provided movably in the vertical direction at a predetermined interval, the movable interval of the inner plug is b, and the maximum inclination angle of the inner plug is α
°, the outer diameter of the inner plug is f, the interval between the same vertical surface from the lower end of the outer periphery of the inner plug to the outer periphery of the lower surface of the inner sealing ring is c, and the plane of the lower surface of the inner sealing ring is c. When the internal diameter is d and the planar internal diameter of the upper surface of the bottle neck is e, c × tan α ° <(ed) / 2.
And f × tan α ° = b
It is a peace cap.

[0006]

Next, an embodiment of a two-piece cap according to the present invention will be described in detail with reference to the drawings. 1A and 1B are explanatory diagrams showing reference numerals of respective parts of a two-piece cap according to an embodiment. FIG. 1A shows reference numerals of angles and dimensions when an inner plug is inclined in a cap body, and FIG. , The sign of the dimension of the inner plug is shown, and (c) shows the sign of the dimension of the bottle neck.

[0007] The two-piece cap of the present embodiment is shown in FIG.
As shown in (a), a screwing portion (121) provided on the inner peripheral surface of the peripheral wall (120) is screwed to a screwing portion (22) provided on the outer peripheral surface of the bottle mouth neck portion (21). And an inner sealing ring (210) for vertically attaching the inner peripheral surface of the cap body (100) and the inner peripheral surface of the mouth of the bottle mouth and neck to the inner surface of the bottle. ), Wherein the inner plug is provided below the inner surface of the top plate of the cap body so as to be movable vertically by a predetermined interval. And FIG.
As shown in (a), the movable interval of the inner plug (200) is b, the maximum inclination angle of the inner plug is α °, and the outer diameter of the inner plug is f as shown in FIG. 1 (b). As shown in FIG. 1 (c), the distance between the same vertical plane from the lower end of the inner plug to the outer periphery of the lower surface of the inner sealing ring is c, and the inner diameter of the lower surface of the inner sealing ring is d. When the plane inner diameter of the upper surface of the neck and neck of the bottle is e, c × tan α ° <
The product is designed so that (ed) / 2 and fxtanα ° = b.

The inner plug of the above-described embodiment has a disk-like shape in which an inner sealing ring is suspended from the lower surface. The shape of the tip of the inner sealing ring is outside the annular plane. In order to facilitate insertion into the mouth of the bottle mouth and neck, a curved guide outer peripheral surface that gradually spreads outward upward is continuous, and the shape of the mouth of the bottle mouth and neck is annular. In order to facilitate the insertion of the tip of the inner sealing ring, a guide slope inclined downward is continuous inside the flat surface. The cap body is usually made by injection molding using a thermoplastic resin such as polypropylene or polyethylene, and the inner plug is usually
It is produced by injection molding using a thermoplastic resin such as polyethylene.

As shown in FIG. 1A, the two-piece cap of the present embodiment is filled with a liquid content such as a beverage while the inner plug is inclined in the cap body on the filling line. Even if the cap is screwed onto the mouth and neck of the bottle, the specification of the cap is c × tan α ° <(e−
d) / 2, and f × tanα ° = b, so that the outer surface of the curved guide outside the annular plane at the tip of the inner sealing ring of the inner plug and the neck of the bottle mouth Abuts against the guide slope inside the annular plane of the mouth of the bottle, and the annular plane at the tip of the inner sealing ring of the inner plug does not abut against the annular plane of the mouth of the mouth and neck of the bottle Therefore, the inner sealing ring of the inner plug is completely fitted in the mouth and neck of the bottle, and the capping failure does not occur.

[0010]

According to the two-piece cap of the present invention, since the dimensions of the predetermined portion are regulated, even if the inner plug is inserted in the cap body in a state where the inner plug is inclined, the mouth of the bottle can be placed on the filling line. When capping the neck, the annular flat surface at the tip of the inner sealing ring of the inner plug does not come into contact with the annular flat surface at the mouth of the bottle. The inner sealing ring of the inner plug fits completely,
No capping failure occurs.

[Brief description of the drawings]

FIG. 1 (a) is an explanatory view showing signs of angles and dimensions when an inner plug is inclined in a cap body, and FIG. 1 (b).
FIG. 4 is an explanatory view showing the reference numerals of the dimensions of the inner plug, and FIG.
It is explanatory drawing which shows the code | symbol of the dimension of a bottle neck part.

[Explanation of symbols]

 10 Two-piece cap 21 Bottle neck and neck 22, 121 Screw part 100 Cap body 110 Top plate 120 Peripheral wall 200 Inner plug 210 Inner sealing ring

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takekuni Seki 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. F-term (reference) 3E084 AA04 AA12 AB01 BA03 CA01 CC03 CC04 CC05 DA01 DB12 DC03 DC04 DC05 EA04 EC03 EC04 FA09 FB01 GA01 GB01 GB12 HA03 HB01 HC03 HD04 KB01 LD01

Claims (1)

[Claims] 1. A two-piece cap comprising a cap body and an inner plug having an inner sealing ring, which is screwed and attached to the neck and neck of the bottle, wherein the inner plug is an inner surface of a top plate of the cap body. Below, it is provided movably in the vertical direction by a predetermined interval, the movable interval of the inner plug is b, the maximum inclination angle of the inner plug is α °, the outer diameter of the inner plug is f, The distance between the same vertical plane from the outer periphery lower end of the stopper to the outer periphery of the lower surface of the inner sealing ring is c, the inner diameter of the lower surface of the inner sealing ring is d, and the inner diameter of the upper surface of the bottle neck is Is e, c × tan α ° <
(Ed) / 2, and fxtanα ° = b, a two-piece cap.